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Babbage, Charles in correspondent 
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Herschel12622

From:
Sir John Herschel
To:
Charles Babbage
Date:
[26 January 1814]
Source of text:
TxU:H/L-0047; Reel 1054
Summary:

Chemical news: decomposition of 'sulphuret of carbon' by J. J. Berzelius and Alexander Marcet. Analysis of 'azotane' and discovery of 'iode' by Humphry Davy. Congratulations on results of CB's examination.

Contributor:
John Herschel Project

Herschel12623

From:
Sir John Herschel
To:
Charles Babbage
Date:
[4 August 1814]
Source of text:
TxU:H/L-0048; Reel 1054
Summary:

Feigned reproach for CB's return to 'the Analytics.' Inquires about CB's 'Devonshire Ghost at Chudleigh.' Results of JH's chemistry experiments. Derides scientists who promote theory of 'akasch' as the one and only form of matter. Met Alexander Marcet in Greenwich.

Contributor:
John Herschel Project

Herschel12624

From:
Sir John Herschel
To:
Charles Babbage
Date:
[20 September 1814]
Source of text:
RS:HS 2.30 (C: RS:HS 20.19 & TxU:H/L-0049.1; Reel 1054)
Summary:

Gratitude for CB's friendship. Chemical supplies and instruments. Describes synthesis of 'Sulphurane' [S2Cl2] and other experiments. Theories of combustion and acids. [Letter continued on 1813-9-21:] JH avidly studying law, against father's wishes.

Contributor:
John Herschel Project

Herschel12625

From:
Sir John Herschel
To:
Charles Babbage
Date:
[25 October 1814]
Source of text:
TxU:H/L-0049.2; Reel 1054
Summary:

CB has founded 'a calculus totally new and immensely powerful.'

Contributor:
John Herschel Project

Herschel12626

From:
Sir John Herschel
To:
Charles Babbage
Date:
[23 March 1815]
Source of text:
TxU:H/L-0050; Reel 1054
Summary:

Attending E. D. Clarke's mineralogy lectures. JH's analysis of dioptase.

Contributor:
John Herschel Project

Herschel12627

From:
Sir John Herschel
To:
Charles Babbage
Date:
[9 November 1818]
Source of text:
RS:HS 2.97 (C: RS:HS 20.57 & TxU:H/L-0051.1; Reel 1054 inc)
Summary:

Welcome back to London. Explain CB's demonstration of 'theorem in transcendental arithmetic.' JH's observations of 'new acid' [hyposulfurous] and optical phenomena in 'chrystals of nitre.'

Contributor:
John Herschel Project

Herschel12628

From:
Sir John Herschel
To:
Charles Babbage
Date:
[2 December 1818]
Source of text:
TxU:H/L-0051.2; Reel 1054
Summary:

Cannot meet CB in London this week. Has verified composition of [hyposulfurous] acid. Encloses crystal of 'sulpho=sulphite of lime.'

Contributor:
John Herschel Project

Herschel12629

From:
Sir John Herschel
To:
Charles Babbage
Date:
[6 December 1818]
Source of text:
TxU:H/L-0051.3; Reel 1054
Summary:

Fifth [1817] edition of Thomas Thomson's System of Chemistry shows previous discovery of JH's 'new acid,' but its reported composition is wrong.

Contributor:
John Herschel Project

Herschel12630

From:
Sir John Herschel
To:
Charles Babbage
Date:
[25 March 1819]
Source of text:
TxU:H/L-0051.4; Reel 1054
Summary:

Made apparatus for showing rings between 'two Tourmalines.' JH's process for making hyposulfurous acid. Praises W. H. Wollaston's analysis of CB's 'Tonquinate.'

Contributor:
John Herschel Project

Herschel12631

From:
Sir John Herschel
To:
Charles Babbage
Date:
1819-7
Source of text:
TxU:H/L-0051.6; Reel 1054
Summary:

Sent JH's paper on mother-of-pearl and paper on hyposulfurous acid to David Brewster. Tell Brewster of JH's discovery of optical structure in crystals of bicarbonate of potash. Would Brewster accept paper from JH enlarging the definition of crystals?

Contributor:
John Herschel Project

Herschel1547

From:
Sir John Herschel
To:
Charles Babbage
Date:
[27 July 1819]
Source of text:
BL Aaa 32292.123
Summary:

JH understands CB to be a candidate for a professorial chair, and JH writes a warm letter of support.

Contributor:
John Herschel Project

Herschel5048

From:
Charles Babbage
To:
Sir John Herschel
Date:
[20 June 1812]
Source of text:
RS:HS 2.1
Summary:

Sending an equation in calculus for him to give opinion.

Contributor:
John Herschel Project

Herschel5049

From:
Sir John Herschel
To:
Charles Babbage
Date:
1] July [1812
Source of text:
RS:HS 2.2 (C: 20.1)
Summary:

Answer to CB's equation. Bring something to discuss at the forthcoming meeting of the Analytical Society.

Contributor:
John Herschel Project

Herschel5050

From:
Charles Babbage
To:
Sir John Herschel
Date:
[10 July 1812]
Source of text:
RS:HS 2.3
Summary:

Further comments on his original query [see CB's 1812-6-20] regarding the equation in calculus.

Contributor:
John Herschel Project

Herschel5051

From:
Sir John Herschel
To:
Charles Babbage
Date:
[14 August 1812]
Source of text:
RS:HS 2.4 (C: RS:HS 20.2)
Summary:

Further comment on the calculus equation sent by CB.

Contributor:
John Herschel Project

Herschel5052

From:
Charles Babbage
To:
Sir John Herschel
Date:
[22 December 1812]
Source of text:
RS:HS 2.5
Summary:

Sending details of some new theorems he has come across.

Contributor:
John Herschel Project

Herschel5053

From:
Sir John Herschel
To:
Charles Babbage
Date:
[1812]
Source of text:
RS:HS 20.3
Summary:

Sends on part of letter for CB to complete and forward.

Contributor:
John Herschel Project

Herschel5054

From:
Sir John Herschel
To:
Charles Babbage
Date:
[1812-8]
Source of text:
RS:HS 20.4
Summary:

About the mathematical formulation for the summation of any series.

Contributor:
John Herschel Project

Herschel5055

From:
Sir John Herschel
To:
Charles Babbage
Date:
[8 February 1813]
Source of text:
RS:HS 2.6 (C: RS:HS 20.5)
Summary:

Regarding the equations in his memoir on the series of tangents. Queries about the Analytical Society.

Contributor:
John Herschel Project

Herschel5056

From:
Charles Babbage
To:
Sir John Herschel
Date:
[19 February 1813]
Source of text:
RS:HS 2.7
Summary:

Answers to JH's questions on equations. Regarding the printing of his memoirs. Recent meeting of the Analytical Society.

Contributor:
John Herschel Project
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